“Oppenheimer” (** out of four) was an overly diffuse historical drama about J. Robert Oppenheimer (Cillian Murphy) who was a theoretical physicist who became instrumental in the development of the first nuclear bomb which ushered in the Atomic Age and changed the course of history. Film is incredibly dense with detail and long at nearly three hours yet doesn’t tell you all that much about Oppenheimer himself and is clouded by an overall sense of aloofness and detachment. Some interesting moments to be sure but not as much as you would think from some such a fascinating historical figure. Murphy is somewhat one-note in the lead and much of the all-star supporting cast are wasted. Hard-core fans of director Christopher Nolan and history buffs may like this a little more.